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From Marco Jez, addition of glw extension checking under Windows, and tweaks to

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BlendEquation and RenderStage to correct the extensions being tested.
This commit is contained in:
Robert Osfield
2006-01-18 11:45:58 +00:00
parent 2a39871686
commit a0f43443a4
3 changed files with 45 additions and 3 deletions
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42
src/osg/GLExtensions.cpp
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@@ -24,6 +24,10 @@
#include <vector>
#include <set>
#if defined(WIN32)
#include <windows.h>
#endif
bool osg::isGLExtensionSupported(unsigned int contextID, const char *extension)
{
typedef std::set<std::string> ExtensionSet;
@@ -56,6 +60,44 @@ bool osg::isGLExtensionSupported(unsigned int contextID, const char *extension)
startOfWord = endOfWord+1;
}
if (*startOfWord!=0) extensionSet.insert(std::string(startOfWord));
#if defined(WIN32)
// add WGL extensions to the list
typedef const char* WINAPI WGLGETEXTENSIONSSTRINGARB(HDC);
WGLGETEXTENSIONSSTRINGARB* wglGetExtensionsStringARB =
(WGLGETEXTENSIONSSTRINGARB*)getGLExtensionFuncPtr("wglGetExtensionsStringARB");
typedef const char* WINAPI WGLGETEXTENSIONSSTRINGEXT();
WGLGETEXTENSIONSSTRINGEXT* wglGetExtensionsStringEXT =
(WGLGETEXTENSIONSSTRINGEXT*)getGLExtensionFuncPtr("wglGetExtensionsStringEXT");
const char* wglextensions = 0;
if (wglGetExtensionsStringARB)
{
HDC dc = wglGetCurrentDC();
wglextensions = wglGetExtensionsStringARB(dc);
}
else if (wglGetExtensionsStringEXT)
{
wglextensions = wglGetExtensionsStringEXT();
}
if (wglextensions)
{
const char* startOfWord = wglextensions;
const char* endOfWord;
while ((endOfWord = strchr(startOfWord, ' ')))
{
extensionSet.insert(std::string(startOfWord, endOfWord));
startOfWord = endOfWord+1;
}
if (*startOfWord != 0) extensionSet.insert(std::string(startOfWord));
}
#endif
osg::notify(INFO)<<"OpenGL extensions supported by installed OpenGL drivers are:"<<std::endl;
for(ExtensionSet::iterator itr=extensionSet.begin();